using Application.Abstractions.Data;
using Application.Abstractions.Messaging.Email;
using Domain.Entities.Common;
using Domain.Entities.Common.ValueObject;
using Microsoft.Extensions.Logging;

namespace Infrastructure.Messaging.Email;

/// <summary>
/// EmailLog 큐에 INSERT만 수행. MailWorker가 별도로 폴링하여 SMTP 송신.
/// API 단에서만 사용. (Admin은 DirectMailService로 즉시 발송)
/// </summary>
public class QueuedMailService : IMailService
{
    private readonly ILogger<QueuedMailService> _logger;
    private readonly IAppDbContext _db;

    public QueuedMailService(ILogger<QueuedMailService> logger, IAppDbContext db)
    {
        _logger = logger;
        _db = db;
    }

    public async Task SendAsync(SendData data, CancellationToken ct = default)
    {
        var now = DateTime.UtcNow;
        var entry = new EmailLog
        {
            ToAddress = data.ToAddress,
            Subject = data.Subject,
            MessageHtml = data.MessageHtml,
            MessageText = data.MessageText,
            Status = MailStatus.Pending,
            RetryCount = 0,
            MaxRetryCount = 3,
            NextRetryAt = now,
            CreatedAt = now
        };

        await _db.EmailLog.AddAsync(entry, ct);
        await _db.SaveChangesAsync(ct);

        _logger.LogInformation("Email queued (ID={ID}) to {ToAddress} subject={Subject}", entry.ID, data.ToAddress, data.Subject);
    }
}